Here is the full list of all 52 Sid Meier's Ace Patrol achievements.
Win an Offensive as the Americans
Shoot down an enemy zeppelin
Earn 5 Victories with a American Pilot
Win a Mission at Pilot difficulty level
Shoot down 3 planes with 1 pilot in 1 mission: Rookie
Earn 5 Victories with a German Pilot
Earn 5 Victories with a British Pilot
Earn 5 Victories with a French Pilot
Earn 50 Victories with a German Pilot
Earn 50 Victories with a American Pilot
Earn 50 Victories with a British Pilot
Earn 50 Victories with a French Pilot
Win an Offensive as the Germans
Win an Offensive as the British
Win an Offensive as the French
Win the Campaign as the Germans
Win the Campaign as the Americans
Win the Campaign as the British
Win the Campaign as the French
Earn 5,000 points with a German squadron
Earn 5,000 points with a American squadron
Earn 5,000 points with a British squadron
Earn 5,000 points with a French squadron
Earn 10,000 points with a German squadron
Earn 10,000 points with a American squadron
Earn 10,000 points with a British squadron
Earn 10,000 points with a French squadron
Earn 15,000 points with a German squadron
Earn 15,000 points with a American squadron
Earn 15,000 points with a British squadron
Earn 15,000 points with a French squadron
Earn 50,000 points with a German squadron
Earn 50,000 points with a American squadron
Earn 50,000 points with a British squadron
Earn 50,000 points with a French squadron
Earn 100,000 points with a German squadron
Earn 100,000 points with a American squadron
Earn 100,000 points with a British squadron
Earn 100,000 points with a French squadron
Earn 150,000 points with a German squadron
Earn 150,000 points with a American squadron
Earn 150,000 points with a British squadron
Earn 150,000 points with a French squadron
Win a Mission at Ace difficulty level
Win a Mission at Leader difficulty level
Win a Mission at Legend difficulty level
Shoot down 3 planes with 1 pilot in 1 mission: Pilot
Shoot down 3 planes with 1 pilot in 1 mission: Ace
Shoot down 3 planes with 1 pilot in 1 mission: Leader
Shoot down 3 planes with 1 pilot in 1 mission: Legend
Create a Squadron with four aces
Destroy an enemy supply train